EP0760418A2 - Rückschlagklappe und -sitz - Google Patents

Rückschlagklappe und -sitz Download PDF

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Publication number
EP0760418A2
EP0760418A2 EP96202375A EP96202375A EP0760418A2 EP 0760418 A2 EP0760418 A2 EP 0760418A2 EP 96202375 A EP96202375 A EP 96202375A EP 96202375 A EP96202375 A EP 96202375A EP 0760418 A2 EP0760418 A2 EP 0760418A2
Authority
EP
European Patent Office
Prior art keywords
flapper
check valve
upstream
seating member
lid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96202375A
Other languages
English (en)
French (fr)
Other versions
EP0760418A3 (de
EP0760418B1 (de
Inventor
Michael E. Wilson, Jr.
Roy C. Bates
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FMC Technologies Inc
Original Assignee
FMC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FMC Corp filed Critical FMC Corp
Publication of EP0760418A2 publication Critical patent/EP0760418A2/de
Publication of EP0760418A3 publication Critical patent/EP0760418A3/de
Application granted granted Critical
Publication of EP0760418B1 publication Critical patent/EP0760418B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B34/00—Valve arrangements for boreholes or wells
    • E21B34/06—Valve arrangements for boreholes or wells in wells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B2200/00—Special features related to earth drilling for obtaining oil, gas or water
    • E21B2200/05—Flapper valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7854—In couplings for coaxial conduits, e.g., drill pipe check valves
    • Y10T137/7857—Valve seat clamped between coupling elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7898—Pivoted valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7898—Pivoted valves
    • Y10T137/7903—Weight biased

Definitions

  • the present invention relates generally to fluid handling systems and, more specifically, to check valves designed for use in isolating various components in a well or pumping assembly by preventing back flow to such assemblies in situations where there is a drop or reversal in regular flow pressure.
  • Check valves are used in a variety of applications in which it is desirable to provide means for preventing back flow when there is a drop or reversal in regular flow pressure. Check valves are used in fluid handling assemblies where it is desirable to trap back flow to prevent damage upstream or to stop back flow when regular flow is stopped in order to replace or service upstream components.
  • Typical check valves comprise two interfitting housing components with ends adapted to fit into a flow line.
  • a hatch or flapper is positioned within the housing assembly to move into and out of a stop flow position in response to a drop in regular flow pressure in order to prevent back flow.
  • the flapper is typically hinged to the valve body or housing assembly and positioned so that gravity or a spring bias will close the flapper over the flow path in the absence of regular flow pressure that is sufficient to overcome the spring bias or gravity force of the flapper.
  • Typical check valve assemblies include a seat assembly positioned in the valve housing in sealing contact therewith and encircling the flow path.
  • the seat assembly provides a sealing surface around the flow path that cooperates with the flapper to form a closed seal around the flow path when the flapper is in the closed or stop flow position.
  • the typical seat sealing surface is either vertically aligned or angled upward such that if the flapper is gravity activated, the hinge is positioned at the top of the sealing surface such that the flapper swings down and contacts the sealing surface prior to reaching a fully hanging position.
  • a torsion spring is generally required to provide sufficient sealing force between the flapper and the seat. Since a free-hanging hinged flapper will rest in a vertical position, a torsion spring is required to provide additional rotational force which will bias the flapper in the horizontal direction against a vertical seat.
  • the seat sealing surface is angled upward causing the flapper to contact the seat prior to the free-hanging vertical position so that the flapper weight causes a resultant force component to be directed against the seat.
  • Free-hanging flappers are advantageous in that by eliminating the torsion spring, the force from the regular flow pressure needed to overcome the flapper is minimized and thus the flapper swings out of the way of the flow with less resistance thereby minimizing erosion of the flapper and sealing surface caused by being in the flow path. Also, the potential for spring failure due to fatigue or wear is eliminated.
  • Typical check valves require a hinge-pin assembly that is fixed relative to the inside of the valve housing.
  • the hinge-pin assembly usually includes a pin having one or more fastening means extending through or into the housing, requiring additional structural and sealing components.
  • Such construction requires the components for the seat assembly, the flapper and hinge assembly, and the flapper spring to be numerous, complex, and expensive. Replacement and field servicing for such check valve assemblies is expensive, time consuming and difficult. In addition, there are more components subject to erosion and wear.
  • the present invention is directed to a check valve and method for making the same, wherein the check valve comprises a single-piece valve seat having integral hinge-pin supports and an angular seat profile adapted to form a seal with a movable flapper.
  • FIG.1 is a partial sectional view of the present invention check valve.
  • FIG.2 is a cross-sectional view of the check valve of FIG.1.
  • FIG.3 is a cross-sectional view of the flapper, seat and hinge assembly of the present invention check valve of FIG.1.
  • FIG.4 is a front view of the assembly of FIG.3.
  • a check valve assembly according to the present invention (10) is shown generally in FIGS.1 and 2.
  • the assembly (10) comprises two interfitting housing portions (12,14) each having an outside end (16,18) adapted to be fitted into the flow path of a conventional flow line (not shown).
  • the outside ends (16,18) may include threads (20), as shown in FIG.1,or other known means for sealing attachment to a flow line.
  • Each housing portion (12,14) has an inside end (24, 26) adapted to interfit with the other in sealing relation thereby forming a closed flow path (28) therethrough.
  • the inside ends (24,26) may be fitted with threads (30,32) as shown in FIG.1 or other known means for interfitting.
  • FIG.1 shows a first housing portion inside end (24) received inside a second housing portion end (26).
  • the seat component (34) is machined with flapper-mounting means (36,38) from a single piece of material.
  • the base (40) of the seat component (34) has a flat profile that seats against the second housing portion (14) and a planar top surface (42) that is arranged to form an upwardly angled plane when positioned in the check valve housing portions (12,14).
  • the flapper-mounting means (36,38) are formed integrally on the seat component (34) at a location at the upper portion of the planar top surface (42) such that a flapper or lid (44) can be suspended therefrom to hang over the flow path (28).
  • a hinge-pin (46) attaches the flapper (44) to the flapper-mounting means (36,38) through hinge arms (48, 50) provided near the outer edge of the flapper (44).
  • the flapper-mounting means (36,38) comprise a cut-out portion (36) of the planar top surface (42) and resulting extensions (38) to receive the hinge-pin (46) through pin access clearances (52) on the side of the extensions (38) opposite the cut-out portion (36) and pin holes (53) through the extensions (38).
  • the assembly of the seat component (34), the flapper (44) and the hinge-pin (46) is positioned with the closed structure formed by the interfitting housing portions (12, 14).
  • the seat component (34) is oriented and held in place by an alignment pin (54) received in a semi-circular profiled hole (56,58) in each of the downstream housing portion (12) and the seat component (34), respectively.
  • Suitable seals such as o-rings (60, 62) are provided to seal the flow path (28) inside the check valve assembly (10).
  • a base support (64) can be provided to support the check valve assembly (10).
  • the flapper (44) will move into the closed position as shown in FIG.2 under the force of gravity, thereby forming a seal with the planar top surface (42). It is understood that the present invention can be practiced with the use or a conventional torsion spring (not shown) or similar means at the hinge to provide additional sealing or flapper-closing force.
  • the portion of the flapper (42) that contacts the planar top surface (42) can be provided with an elastomer or other preferred seal face material.
  • Assembly of the check valve means is provided as follows.
  • the o-ring seals (60,62) and other seal means are lubricated and installed to the seat component (34) for insertion into the housing (12,14) therewith.
  • the flapper hinge arms (48,50) are aligned between the seat component extensions (38) so that the hinge-pin (46) can pass through and freely rotate.
  • the alignment pin (54) is inserted into the semi-circular hole (58) of the seat component (34).
  • the above mentioned assembly is inserted into the cavity of the body housing (12) and aligned so that the alignment pin (54) is received in the semi-circular hole (56) therein. Additional seals and lubricants as desired are added to the seat component to interface with the other body housing (14).
  • the upstream body housing (14) is then attached to the downstream housing (12) to enclose the seat component (34) and flapper (44) assembly therein. Set screws and other conventional fastening means can be used to attached the body housings. The entire assembly can then be fixed to a base support (64).

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Check Valves (AREA)
  • Reciprocating Pumps (AREA)
EP96202375A 1995-08-24 1996-08-26 Rückschlagklappe und -sitz Expired - Lifetime EP0760418B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US518949 1995-08-24
US08/518,949 US5713389A (en) 1995-08-24 1995-08-24 Check valve and check valve seat

Publications (3)

Publication Number Publication Date
EP0760418A2 true EP0760418A2 (de) 1997-03-05
EP0760418A3 EP0760418A3 (de) 1998-05-13
EP0760418B1 EP0760418B1 (de) 2002-10-16

Family

ID=24066161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96202375A Expired - Lifetime EP0760418B1 (de) 1995-08-24 1996-08-26 Rückschlagklappe und -sitz

Country Status (8)

Country Link
US (1) US5713389A (de)
EP (1) EP0760418B1 (de)
JP (1) JP2782337B2 (de)
BR (1) BR9603562A (de)
CA (1) CA2184023C (de)
DE (1) DE69624304D1 (de)
MX (1) MX9603620A (de)
NO (1) NO310119B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060233A1 (en) 2007-11-06 2009-05-14 Petrowell Limited 'valve assembly'
CN101949274A (zh) * 2010-08-27 2011-01-19 陈尚礼 一种注水泥作业用套管关井阀
CN106555562A (zh) * 2015-09-24 2017-04-05 中国石油化工股份有限公司 排量控制复位式自灌浆盲板
KR20190090258A (ko) * 2018-01-24 2019-08-01 한국전력공사 세그먼트와 세그먼트 조립체 및 그라우팅 장치
CN110107717A (zh) * 2019-04-02 2019-08-09 商文辉 一种反向泄压式无干扰止回阀

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19832842C1 (de) * 1998-07-21 2000-02-17 Bosch Gmbh Robert Kraftstoff-Fördersystem zur Kraftstoffversorgung einer Brennkraftmaschine
US6164333A (en) * 1999-03-02 2000-12-26 Apcom, Inc. Convection heat trap
JP4276727B2 (ja) * 1999-03-03 2009-06-10 株式会社ニフコ バルブ
US6155291A (en) * 1999-08-25 2000-12-05 Hunter Innovations Backflow prevention apparatus
US6237625B1 (en) * 2000-02-23 2001-05-29 Ronald E. Randolph Dual plate check valve
DE102004003113A1 (de) * 2004-01-21 2005-08-11 Siemens Ag Vorrichtung zum Steuern eines Druckes in einer Kraftstoff-Vorlaufleitung
US20050263190A1 (en) * 2004-05-28 2005-12-01 Apcom, Inc. Double heat trap in unitary body
US20060283086A1 (en) * 2005-06-15 2006-12-21 John Rittie Air release
US20080245420A1 (en) * 2007-04-09 2008-10-09 Tom Randy Davidson Nozzle Attachment for Fire Hydrant
US7874307B1 (en) * 2007-10-05 2011-01-25 Deocampo Eduardo R Check valve and method of use
US20100132806A1 (en) * 2008-12-01 2010-06-03 Mcwane Incorporated D/B/A Kennedy Valve Fire hydrant check valve
GB0901920D0 (en) * 2009-02-06 2009-03-11 Cozens Albert Non-return valve adapter for water closet
US20100314571A1 (en) * 2009-06-15 2010-12-16 Baker Hughes Incorporated Unitary Flapper Base and Method of Manufacture
KR100946566B1 (ko) * 2009-11-18 2010-03-11 주식회사 인포피아 측방 유동 면역 분석 디바이스
US9057243B2 (en) * 2010-06-02 2015-06-16 Rudolf H. Hendel Enhanced hydrocarbon well blowout protection
US10113382B2 (en) * 2010-06-02 2018-10-30 Rudolf H. Hendel Enhanced hydrocarbon well blowout protection
US8887757B2 (en) * 2012-03-12 2014-11-18 Hayward Industries, Inc. Wafer check valve assembly and related methods of use
GB2511531A (en) 2013-03-06 2014-09-10 Managed Pressure Operations Valve assembly
US9435444B2 (en) * 2014-04-10 2016-09-06 The Boeing Company Valve system
JP1527237S (de) * 2014-10-24 2015-06-22
DE102014224264A1 (de) * 2014-11-27 2016-06-02 Mahle International Gmbh Rücklaufsperrventil
US10890265B2 (en) 2016-05-23 2021-01-12 Fmc Technologies, Inc. Check valve
KR101967798B1 (ko) * 2017-01-04 2019-04-10 정민시 역류방지 배관용 소켓
US10295071B2 (en) 2017-06-16 2019-05-21 Cantex International, Inc. Flapper valve
EP3499105B1 (de) * 2017-12-15 2020-05-27 Hamilton Sundstrand Corporation Rückschlagventile
KR102220616B1 (ko) * 2019-06-17 2021-02-25 박남희 동파 방지용 스프링클러 시스템
US11306835B1 (en) 2019-06-17 2022-04-19 KHOLLE Magnolia 2015, LLC Flapper valves with hydrofoil and valve systems
US11098821B1 (en) 2019-10-10 2021-08-24 Cantex International, Inc. Flapper valve
US11953113B2 (en) * 2020-02-14 2024-04-09 Crane Chempharma & Energy Corp. Valve with unobstructed flow path having increased flow coefficient
US11946557B2 (en) 2020-02-14 2024-04-02 Crane Chempharma & Energy Corp. Valve with unobstructed flow path having increased flow coefficient
US11841089B2 (en) 2020-02-14 2023-12-12 Crane Chempharma & Energy Corp. Valve with unobstructed flow path having increased flow coefficient

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454072A (en) * 1944-08-04 1948-11-16 Fred R Long Combined pipe union and check valve
US2913001A (en) * 1956-12-27 1959-11-17 Flight Refueling Inc Check valve
GB850091A (en) * 1957-10-09 1960-09-28 British Oxygen Co Ltd Non-return valve
US3144876A (en) * 1962-04-25 1964-08-18 Halliburton Co Swing-type check valve
US3933173A (en) * 1968-02-26 1976-01-20 Yoshio Kajita Check valve
US4128111A (en) * 1976-06-18 1978-12-05 Hansen George E Wafer swing check valves
GB1593850A (en) * 1977-10-07 1981-07-22 Powerhouse Eng Ltd Screw pump

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US326549A (en) * 1885-09-22 Check-valve
US380940A (en) * 1888-04-10 Lotjis schtjtte
USRE21334E (en) * 1940-01-23 Check valve
US818670A (en) * 1904-01-15 1906-04-24 Perry Dumbolton Union check-valve.
US831141A (en) * 1905-05-23 1906-09-18 Arthur W Cash Check-valve.
US1286672A (en) * 1916-12-16 1918-12-03 Fred O Lindgren Union check-valve.
US2262726A (en) * 1939-11-18 1941-11-11 Chapman Valve Mfg Co Pivoted disk valve apparatus
US3687157A (en) * 1971-04-08 1972-08-29 Jeff David Whitmer Trap for drill pipe
JPS5210752Y2 (de) * 1972-07-03 1977-03-08
US4274436A (en) * 1979-08-16 1981-06-23 Xomox Corporation Wafer-type swing check valve construction
US4291722A (en) * 1979-11-02 1981-09-29 Otis Engineering Corporation Drill string safety and kill valve
US4586534A (en) * 1984-04-23 1986-05-06 Daniel Industries Check valve mechanism
JPH0318783Y2 (de) * 1985-07-17 1991-04-19
US4781214A (en) * 1987-03-09 1988-11-01 Scaramucci John P Swing check valve disc
US4809739A (en) * 1987-03-09 1989-03-07 Scaramucci John P Check valve
US4825902A (en) * 1988-01-11 1989-05-02 Halliburton Company Flapper valve with protective hinge pin sleeve
US4813451A (en) * 1988-07-20 1989-03-21 Scaramucci John P Swing check valve with removable cartridge
US4967790A (en) * 1989-06-26 1990-11-06 Ganske Roger H Swing check valve
US5044396A (en) * 1990-06-18 1991-09-03 Daudet Howard C Check valve for fluids
US5141052A (en) * 1991-01-09 1992-08-25 Bump David L Wellhead stuffing box for polished rod and accessories for same
US5161570A (en) * 1991-09-18 1992-11-10 Scaramucci John P Top-entry check valve with threaded fasteners
US5522423A (en) * 1994-08-15 1996-06-04 Elliott; Pat S. Forged body full port swing check valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454072A (en) * 1944-08-04 1948-11-16 Fred R Long Combined pipe union and check valve
US2913001A (en) * 1956-12-27 1959-11-17 Flight Refueling Inc Check valve
GB850091A (en) * 1957-10-09 1960-09-28 British Oxygen Co Ltd Non-return valve
US3144876A (en) * 1962-04-25 1964-08-18 Halliburton Co Swing-type check valve
US3933173A (en) * 1968-02-26 1976-01-20 Yoshio Kajita Check valve
US4128111A (en) * 1976-06-18 1978-12-05 Hansen George E Wafer swing check valves
GB1593850A (en) * 1977-10-07 1981-07-22 Powerhouse Eng Ltd Screw pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009060233A1 (en) 2007-11-06 2009-05-14 Petrowell Limited 'valve assembly'
US9200501B2 (en) 2007-11-06 2015-12-01 Petrowell Limited Valve assembly
CN101949274A (zh) * 2010-08-27 2011-01-19 陈尚礼 一种注水泥作业用套管关井阀
CN101949274B (zh) * 2010-08-27 2012-10-17 陈尚礼 一种注水泥作业用套管关井阀
CN106555562A (zh) * 2015-09-24 2017-04-05 中国石油化工股份有限公司 排量控制复位式自灌浆盲板
KR20190090258A (ko) * 2018-01-24 2019-08-01 한국전력공사 세그먼트와 세그먼트 조립체 및 그라우팅 장치
CN110107717A (zh) * 2019-04-02 2019-08-09 商文辉 一种反向泄压式无干扰止回阀

Also Published As

Publication number Publication date
NO963543L (no) 1997-02-25
DE69624304D1 (de) 2002-11-21
EP0760418A3 (de) 1998-05-13
JPH09119534A (ja) 1997-05-06
MX9603620A (es) 1997-05-31
JP2782337B2 (ja) 1998-07-30
NO310119B1 (no) 2001-05-21
EP0760418B1 (de) 2002-10-16
CA2184023A1 (en) 1997-02-25
NO963543D0 (no) 1996-08-23
US5713389A (en) 1998-02-03
CA2184023C (en) 2005-02-15
BR9603562A (pt) 1998-05-19

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